import java.util.Arrays;

public class SolutionInterview16_1 {
    public int[] swapNumbers(int[] numbers) {
        return new int[]{numbers[1],numbers[0]};
    }

    public static void main(String[] args) {
        System.out.println(Arrays.toString(new SolutionInterview16_1().swapNumbers(new int[]{1, 2})));
    }
}
